CVE-2026-111812: CWE-863 Incorrect Authorization in Apache Software Foundation Apache Traffic Server
Description
Apache Traffic Server contains an incorrect authorization vulnerability in the origin_server_auth plugin that allows a client to force signing of attacker-chosen AWS request headers under the proxy's own credentials. This affects versions from 8.0.0 through 8.1.11, 9.0.0 through 9.2.15, 10.0.0 through 10.1.4, and version 10.2.0. Fixed versions include 9.2.16, 10.1.5, and 10.2.1.
CVSS v3.1
Score 10.0critical
Affected software
Apache Software Foundation
Apache Traffic Server
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-111812 is an incorrect authorization vulnerability (CWE-863) in Apache Traffic Server's origin_server_auth plugin. The flaw allows a client to coerce the proxy into signing AWS request headers chosen by an attacker using the proxy's own credentials. This could lead to unauthorized actions being performed with the proxy's AWS credentials. The vulnerability affects Apache Traffic Server versions >=8.0.0 <=8.1.11, >=9.0.0 <=9.2.15, >=10.0.0 <=10.1.4, and =10.2.0. The issue is addressed in versions 9.2.16, 10.1.5, and 10.2.1.
Potential Impact
An attacker can exploit this vulnerability to have the proxy sign AWS request headers with its own credentials, potentially enabling unauthorized AWS actions under the proxy's identity. The CVSS v3.1 score is 10.0 (critical), indicating high impact on confidentiality and integrity without requiring privileges or user interaction.
Mitigation Recommendations
A fix is available. Users should upgrade Apache Traffic Server to versions 9.2.16, 10.1.5, or 10.2.1 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-10-16T20:22:21.735Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Is Cloud Service
- true
Threat ID: 6ad916a44d27ba8daaf52978
Added to database: 10/21/2026, 19:46:44 UTC
Last enriched: 10/21/2026, 20:00:20 UTC
Last updated: 10/21/2026, 20:00:20 UTC
Views: 4
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